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Removing thermal energy from a substance will:
The answer is all of the these because removing thermal energy will change a substance's state, temperature, and particle motion.
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Which answer choice is the best example of a non-renewable natural resource?
The answer is "Oil is made by the Earth over millions of years through the pressurization of organic material under Earth's crust." This process occurs over millions of years, and is naturally occuring.
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Which answer choice is NOT a natural resource?
Gasoline is not a natural resource because it is man-made.
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Certain types of metals, like gold, are both naturally occurring and can be created in a lab. (This process is not used often because it is expensive and not efficient!) This tells us what about metals like gold?
The answer is "Gold is a natural resource that can sometimes be synthetic." Some substances can be either natural or synthetic and it depends on how the substance was made.
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Which answer choice is NOT an example of a synthetic substance?
The answer is water. Water exists naturally in the environment, therefore it is a natural resource.
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Synthetic materials are:
Synthetic materials are made by chemical reactions. They are not always bad for the environment and can be renewable. By definition, synthetic materials are man-made and not made by the Earth.
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Malleability, flammability, melting point, boiling point, and toxicity are all examples of:
The answer is "both chemical and physical properties" because they can be observed in physical and chemical changes.
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The process of adding thermal energy to a solid and transforming it directly to a gas without first turning it to a liquid is called:
The answer is sublimation. Sublimation is the process of adding thermal energy to a sold and transforming it directly to a gas without first turning it to a liquid.
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An increase in volume due to heating is called:
The answer is thermal expansion. Thermal expansion happens when substances are heated and the particles speed up and take up more space.
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Cooling causes particles in substances to:
The answer is "slow down." When a substance cools it loses its thermal energy which causes the particles to slow down.
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Which answer choice is an example of a natural resource?
The answer is "oil." Natural resources are resources that occur in the natural environment without being man-made.
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Which answer choice best defines a synthetic material?
Synthetic materials are not naturally occurring in the world. They are man-made.
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Plastics are made from natural materials such as cellulose, coal, natural gas, salt and crude oil through something called a polymerisation process. This tells us that plastics are:
The answer is "synthetic materials." All synthetic materials are made from natural resources, but do not exist in the world unless they are man-made.
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True or False: The good news about synthetic materials, like plastic, is that we can always make more, no matter how much we need.
The answer is "False. Even though we can make more synthetic materials like plastic, they are made from natural resources which sometimes take a long time for the Earth to make more of."
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What are some benefits provided by synthetic materials?
Synthetic materials provide all of these benefits.
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The property of metal that means it is easily bent or hammered into different shapes is:
The answer is "malleability." This is a property of metals which means they are easily bent or hammered into new shapes.
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Which property of a substance means that electricity and heat can easily pass thorough it?
The answer is conductivity. Conductivity means electricity and heat can easily pass thorough a substance.
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Which answer choice is NOT likely to be a property of a metal?
The answer is highly flammable. Most metals are not easily caught on fire.
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Density is the property of a substance that means:
Density is the property of a substance that describes the amount of matter per unit volume of a substance.
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Which answer choice is NOT an example of a physical property of a substance?
The answer is corrosiveness because corrosion occurs through chemical reactions and is therefore a chemical property
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